726 PRINCIPAL SIR WILLIAM TURNER ON 



ended below in the incisive region, the fossa prsenasalis was faint and its posterior 

 border passed across the floor of the nose to the ridge behind the maxillo-nasal spine. 

 In the other skull the lateral border was thickened and ended in the maxillo-nasal spine, 

 no definite fossa pr,nenasalis was visible. In both the incisive fossae were distinct and 

 separated by a mesial ridge. The canine fossse were distinct. The nasal index in one 

 was 46*3, in the other 50'9, the mean was mesorhine. 



The maxillo-facial index in one was leptoprosopic, in the other mesoprosopic. The 

 gnathic index in both was orthognathous. The nasio-malar index in one was 1107, 

 pro-opic, in the other 105*9, platyopic. The nasal profile was a little concave. The 

 fronto-malar border of the orbit was thickened in one skull. The intraorbital breadth 

 was 25 mm. in one, 24 in the other. The orbital index was megaseme, high and 

 rounded. The hard palate was highly arched, the maxillo-premaxillary suture was 

 obliterated, the palato-maxillary index in one was mesuranic, 11 3 '2, in the other 

 hyperbrachyuranic, 135*4. 



The cranial sutures in one were in process of fusion, no epipteric bone, nor 

 pterygo-spinous plate, nor third condyl ; in one the jugal had a tubercular para-condylar 

 process. In one skull the breadth was more than the height, in the other they were 

 almost equal, the vertical index was hypsicephalic, high skulls. The mean breadth- 

 height index was 98*2. The cranio-facial index was in the mean 78. In the males the 

 skulls ranged in capacity from 1270 c.c. to 1570 and the mean was 1400 c.c, the 

 capacity in the female was 1329 c.c. 



Of the other two Yaw skulls. No. 27 was dolichocephalic, No. 26 was mesaticephalic. 

 In No. 27 the feminine characters were very distinct ; the occipital squama was bulging ; 

 the skull was cryptozygous. In both the anterior nares had sharp lateral borders, 

 the prsenasal fossae were narrow and the margo infranasalis reached the maxillo-nasal 

 spine. The nasal index was mesorhine. The orbital index in one was megaseme, in 

 the other mesoseme. The senile edentulous condition of the jaws in one prevented 

 their measurements from being taken, but in the female the gnathic index, 104*2, 

 showed a degree of prognathism, whilst the maxillo-facial and complete facial indices 

 were leptoprosopic or high-faced. In the female the teeth were only slightly worn, 

 the lower jaw had a square projecting chin, the angle was somewhat oblique, the 

 coronoid was short, the muscular lines and tubercles were moderate, the mental 

 foramen was below the second premolar. The cranial sutures were distinct, the lambdoid 

 contained a small Wormian bone, no epipterics. 



The variations in type shown by the skulls from the Yaw valley supported the 

 opinion that the people living in it are a mixed population. It is probable that those 

 with the brachy cephalic form of skull and head are similar in race to the brachycephalic 

 Burmese ; whilst those with the dolichocephalic skulls have affinities with the longer- 

 headed tribes of the hill districts, 



